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Property, Plant and Equipment, Net
 3 Months Ended
Mar. 31, 2023
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net Property, Plant and Equipment, Net
Property, plant and equipment, net consisted of the following (in thousands):
March 31,December 31,
20232022
Production equipment$5,114 $4,488 
Lab equipment2,452 2,304 
Leasehold improvements4,080 3,525 
Furniture, fixtures and other equipment360 206 
Construction in progress602 957 
Property, plant and equipment, at cost12,608 11,480 
Less: accumulated depreciation and amortization(7,660)(7,244)
Property, plant and equipment, net$4,948 $4,236 
Depreciation and amortization expense was $0.4 million during each of the three months ended March 31, 2023 and 2022.